The outer nginx procy forwards port 80 (so I can just type in "mediapc/" into firefox for the UI, port 443 and the standard emby port for the Android apps to find the server.

But I've noticed that it's not possible to Chromecast anything from this server. I suspect that it's because the port the chromecast protocol is using isn't port forwarded. I tried to Wireshark the connection and couldn't figure out what needed to be open.

I hope you guys can help me with this Would be nice to use Chromecast again!